Node.js tlsSocket.getCipher()用法及代码示例

tlsSocket.getCipher()方法是tls模块内TLSSocket类的内置应用程序编程接口，用于返回包含有关协商密码套件信息的对象。

用法:

const tlsSocket.getCipher()

参数：此方法不接受任何参数。

返回值：此方法返回一个对象，该对象包含有关协商的密码套件的信息。

如何生成私钥和公共证书？

私钥
第1步：打开记事本并复制粘贴以下 key ：

步骤2：另存为private-key.pem

公开证书
第1步：打开记事本并复制粘贴以下 key ：

步骤2：另存为public-cert.pem

范例1： 文件名：index.js

// Node.js program to demonstrate the 
// tlsSocket.getCipher() method 
var tls = require('tls'), 
    fs = require('fs'), 
  
// Port and host address for server     
PORT = 1337, 
HOST = '127.0.0.1', 
value = null; 
   
// Private key and public certificate 
// for access 
var options = { 
  key:fs.readFileSync('private-key.pem'), 
  cert:fs.readFileSync('public-cert.pem'), 
  rejectUnauthorized:false
}; 
  
// Creating and initializing server 
var server = tls.createServer(options,  
                   function(socket) { 
  
  // Print the data that we received 
  socket.on('data', function(data) { 
     console.log('\nReceived:%s ', 
     data.toString().replace(/(\n)/gm, "")); 
  }); 
  
  // Stopping the server 
  // by using the close() method 
  server.close(() => { 
     console.log("Server closed successfully"); 
  }); 
}); 
  
// Start listening on a specific port 
// and address by using listen() method 
server.listen(PORT, HOST, function() { 
  console.log( 
    "I'm listening at %s, on port %s",  
    HOST, PORT); 
}); 
  
// Creating and initializing client 
var client = tls.connect(PORT, HOST,  
               options, function() { 
    
  // Getting local cipher object by 
  // using tlsSocket.getCipher() method 
  value = client.getCipher(); 
  
  client.write("Cipher:" + value.name); 
    
  client.end(() => { 
    console.log("Client closed successfully"); 
  }); 
});

输出：

I'm listening at 127.0.0.1, on port 1337
Client closed successfully

Received:Cipher:TLS_AES_256_GCM_SHA384
Server closed successfully

范例2：文件名：index.js

// Node.js program to demonstrate the 
// tlsSocket.getCipher() method 
var tls = require('tls'), 
    fs = require('fs'), 
  
    // Port and host address for server     
    PORT = 1337, 
    HOST = '127.0.0.1'; 
  
// Private key and public certificate 
// for acess 
var options = { 
    key:fs.readFileSync('private-key.pem'), 
    cert:fs.readFileSync('public-cert.pem'), 
    rejectUnauthorized:false
}; 
  
// Creating and intializing server 
var server = tls.createServer(options, 
    function (socket) { 
  
        // Getting local cipher object 
        // by using tlsSocket.getCipher() method 
        value = socket.getCipher(); 
  
        socket.write("Cipher:" + value.name); 
  
        // Stopping the server 
        // by using the close() method 
        server.close(() => { 
            console.log("Server closed successfully") 
        }); 
    }); 
  
// Start listening on a specific port  
// and address by using listen() method 
server.listen(PORT, HOST, function () { 
    console.log("I'm listening at %s, "
        + "on port %s", HOST, PORT); 
}); 
  
// Creating and intializing client 
var client = tls.connect(PORT, HOST, 
    options, function () { 
        console.log("client is connected"); 
    }); 
  
client.on("data", function (data) { 
  
    console.log('Received:%s', 
        data.toString().replace(/(\n)/gm, "")); 
  
    // Close the connection after  
    // receiving the message 
    client.end(() => { 
        console.log("client closed successfully") 
    }); 
});

使用以下命令运行index.js文件：

node index.js

输出：

I'm listening at 127.0.0.1, on port 1337
client is connected
Received:Cipher:TLS_AES_256_GCM_SHA384
client closed successfully
Server closed successfully

参考：https://nodejs.org/dist/latest-v12.x/docs/api/tls.html#tls_tlssocket_getcipher

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注：本文由纯净天空筛选整理自RohitPrasad3大神的英文原创作品 Node.js tlsSocket.getCipher() Method。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。